package TooltipInTableCell;// -*- mode:java; encoding:utf-8 -*-
// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@



import java.awt.*;
import java.awt.event.MouseEvent;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import javax.swing.*;
import javax.swing.plaf.ColorUIResource;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableModel;

public final class MainPanel extends JPanel {
  private MainPanel() {
    super(new BorderLayout());
    String[] columnNames = {"String", "List<Icon>"};
    Icon informationIcon = getOptionPaneIcon("OptionPane.informationIcon");
    Icon errorIcon = getOptionPaneIcon("OptionPane.errorIcon");
    Icon questionIcon = getOptionPaneIcon("OptionPane.questionIcon");
    Icon warningIcon = getOptionPaneIcon("OptionPane.warningIcon");
    Object[][] data = {
      {"aa", Arrays.asList(informationIcon, errorIcon)},
      {"bb", Arrays.asList(errorIcon, informationIcon, warningIcon, questionIcon)},
      {"cc", Arrays.asList(questionIcon, errorIcon, warningIcon)},
      {"dd", Collections.singletonList(informationIcon)},
      {"ee", Arrays.asList(warningIcon, questionIcon)}
    };
    TableModel model = new DefaultTableModel(data, columnNames) {
      @Override public Class<?> getColumnClass(int column) {
        return getValueAt(0, column).getClass();
      }
    };
    JTable table = new JTable(model) {
      private static final int LIST_ICON_COLUMN = 1;
      @Override public String getToolTipText(MouseEvent e) {
        Point pt = e.getPoint();
        int row = rowAtPoint(pt);
        int col = columnAtPoint(pt);
        if (convertColumnIndexToModel(col) == LIST_ICON_COLUMN) {
          TableCellRenderer tcr = getCellRenderer(row, col);
          Component c = prepareRenderer(tcr, row, col);
          // Component c = tcr.getTableCellRendererComponent(this, getValueAt(row, col), false, false, row, col);
          if (c instanceof JPanel) {
            Rectangle r = getCellRect(row, col, true);
            c.setBounds(r);
            // @see https://stackoverflow.com/questions/10854831/tool-tip-in-jpanel-in-jtable-not-working
            c.doLayout();
            pt.translate(-r.x, -r.y);
            return Optional.ofNullable(SwingUtilities.getDeepestComponentAt(c, pt.x, pt.y))
                .filter(JLabel.class::isInstance).map(JLabel.class::cast)
                .map(l -> ((ImageIcon) l.getIcon()).getDescription())
                .orElseGet(() -> super.getToolTipText(e));
            // Component l = SwingUtilities.getDeepestComponentAt(c, pt.x, pt.y);
            // if (l instanceof JLabel) {
            //   ImageIcon icon = (ImageIcon) ((JLabel) l).getIcon();
            //   return icon.getDescription();
            // }
          }
        }
        return super.getToolTipText(e);
      }

      @Override public void updateUI() {
        // [JDK-6788475] Changing to Nimbus LAF and back doesn't reset look and feel of JTable completely - Java Bug System
        // https://bugs.openjdk.java.net/browse/JDK-6788475
        // XXX: set dummy ColorUIResource
        setSelectionForeground(new ColorUIResource(Color.RED));
        setSelectionBackground(new ColorUIResource(Color.RED));
        super.updateUI();
        getColumnModel().getColumn(0).setCellRenderer(new DefaultTableCellRenderer());
        getColumnModel().getColumn(LIST_ICON_COLUMN).setCellRenderer(new ListIconRenderer());
        setRowHeight(40);
      }
    };
    table.setAutoCreateRowSorter(true);
    add(new JScrollPane(table));
    setPreferredSize(new Dimension(320, 240));
  }

  public static Icon getOptionPaneIcon(String key) {
    ImageIcon icon = (ImageIcon) UIManager.getIcon(key);
    icon.setDescription(key);
    return icon;
  }

  public static void main(String[] args) {
    EventQueue.invokeLater(MainPanel::createAndShowGui);
  }

  private static void createAndShowGui() {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
      ex.printStackTrace();
      Toolkit.getDefaultToolkit().beep();
    }
    JFrame frame = new JFrame("@title@");
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.getContentPane().add(new MainPanel());
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}

class ListIconRenderer implements TableCellRenderer {
  private final JPanel renderer = new JPanel(new FlowLayout(FlowLayout.LEFT));

  @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    renderer.removeAll();
    if (isSelected) {
      renderer.setOpaque(true);
      renderer.setBackground(table.getSelectionBackground());
    } else {
      renderer.setOpaque(false);
      // renderer.setBackground(table.getBackground());
    }
    if (value instanceof List<?>) {
      ((List<?>) value).stream()
          .filter(Icon.class::isInstance)
          .map(Icon.class::cast)
          .map(ListIconRenderer::makeLabel)
          .forEach(renderer::add);
    }
    return renderer;
  }

  private static Component makeLabel(Icon icon) {
    JLabel label = new JLabel(icon);
    label.setToolTipText(icon.toString());
    return label;
  }
}
